[LTP] [PATCH 1/1] tst_net.sh: Filter out tst_ns_exec TINFO messages

[Petr Vorel]

This is a workaround to filter out tst_ns_exec.c TINFO messages printed
on stderr by tst_has_slow_kconfig(). tst_ns_exec.c is used by default by
$LTP_NETNS in tst_rhost_run().

This fixes errors on shell tests on netns backend (the default):

    # PATH="/opt/ltp/testcases/bin:$PATH" ping01.sh
    ...
    ping01 1 TINFO: initialize 'rhost' 'ltp_ns_veth1' interface
    /opt/ltp/testcases/bin/ping01.sh: 142: [: tst_kconfig.c:88:: unexpected operator
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    /opt/ltp/testcases/bin/ping01.sh: 142: [: tst_kconfig.c:88:: unexpected operator
    ping01 1 TINFO: add remote addr 10.0.0.1/24
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    /opt/ltp/testcases/bin/ping01.sh: 142: [: tst_kconfig.c:88:: unexpected operator
    ping01 1 TINFO: add remote addr fd00:1:1:1::1/64
    tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
    tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
    /opt/ltp/testcases/bin/ping01.sh: 1: eval: tst_kconfig.c:88:: not found
    /opt/ltp/testcases/bin/ping01.sh: 1: eval: 34mTINFO:: not found
    /opt/ltp/testcases/bin/ping01.sh: 1: eval: 34mTINFO:: not found
    /opt/ltp/testcases/bin/ping01.sh: 142: [: tst_kconfig.c:88:: unexpected operator
    /opt/ltp/testcases/bin/ping01.sh: 1: eval: tst_kconfig.c:88:: not found
    /opt/ltp/testcases/bin/ping01.sh: 1: eval: 34mTINFO:: not found
    /opt/ltp/testcases/bin/ping01.sh: 1: eval: 34mTINFO:: not found
    ping01 1 TINFO: Network config (local -- remote):
    ping01 1 TINFO: ltp_ns_veth2 -- ltp_ns_veth1
    ping01 1 TINFO: 10.0.0.2/24 -- 10.0.0.1/24

Fixes: 893ca0abe7 ("lib: multiply the timeout if detect slow kconfigs")
Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
Hi,

alternative to Li's TST_NO_SLOW_KCONFIG_CHECK suggestion:
https://lore.kernel.org/ltp/CAEemH2d6RJ8yd4TcLt-z49fmNKt7eAGg=VhdASkNtE=7cR7bgg@mail.gmail.com/

Maybe even both could be applied.
WDYT?

Kind regards,
Petr

 testcases/lib/tst_net.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/testcases/lib/tst_net.sh b/testcases/lib/tst_net.sh
index ee0ae1cad7..4e8786b704 100644
--- a/testcases/lib/tst_net.sh
+++ b/testcases/lib/tst_net.sh
@@ -265,6 +265,8 @@ tst_rhost_run()
 		[ "$safe" ] && \
 			tst_brk_ TBROK "'$cmd' failed on '$RHOST': '$output'"
 	fi
+	# strip out tst_ns_exec TINFO messages
+	output=$(echo "$output" | grep -v 'TINFO:')
 
 	[ -z "$out" -a -n "$output" ] && echo "$output"
 
-- 
2.47.1